Improvement in regenerator-furnaces



3Sheets-Sheetl. F. H. EI-CHBAUM.

Fig.1.

I M v hon/Jug MAW N.FETERS. PHOTO-LITHOGRAPHER, WASHINGTON, D48- 3 Shets-Sheet 2, F. H. EICHBAUM. REGENERATORIFURNACE. ITO-1771230. Patented May 9,1876.

Inventor yaw/v fimi fifia N. PEIERS, 'PNOTO-UTNOGRAFHER. WASHINGTON. D a

UNITED r'rion PATE T IMPROVEMENT lN REGENERATOR-FURNACES.

Specification forming part of Letters Patent No. [7 7,230, dated May 9, 1876; application filed February 29, 1876.

To all whom it may concern :1 1

Be it known that I, FREDERICK H. EIGH- BAUM, of Detroit, in the county of Wayne and State of Michigan, have invented a new and useful Improvement in Furnaces; andI do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and

to the letters of reference marked thereon.

The object of my improvementis an apparatus for utilizing in a more effective and economical manner fuel used for heating furnaces adapted for the treatment of metals, or for gas or other retorts or crucibles, by introducing large volumes of highly heated air to aid in combustion and my invention therein consists in the peculiar construction of the passages or ductsthrough which the heated air passes in its transit tothe heating or combustion chamber, and through which the products of combustion pass in their transitto the exit, and also in the various combinations of the several operative parts, all as more fully hereinafter explained.

In order that those skilled in the art may be enabled tov make and use my'furnace, I proceed to describe the same, having reference to the drawings, in which.

Figure 1 is a front elevation of my. furnace, showing a bench of three gas-retorts in position; Fig. 2, a front perspective of the same I I with the-top broken away and the front wall removed, so as to exhibit the flue systems; Fig. 3, a vertical central section from side to side of the furnace, with the top broken away; Fig. 4, a vertical longitudinal section upon the line a: w of Fig. 2, and Fig. 5 a separate view of a group of the bricks or tiles which form the passages or flues for the heated air and the products of combustion.

Similar letters denote'corresponding parts in each figure.

In the drawings, A represents the shell or setting of the furnace, made in the ordinary way; B, the usual arches, adapted to be taken down for giving access to the flues; C,the feeding-chute, where fuel is introduced; a, the

.lever for working the cut-off which prevents the escape of the gases of combustion, and

a, the usual poke-holes; D, the ash-pit openings for the admission of air. Above the ashpit is a suitable grate, E, above which is the tire-box, both of which are preferably centrally arranged in-the front of the furnace,

extending usually about one-half of the dis- ,Upoheach side of the fire-box is placed a group of passages, ducts, or fines, F, preferably about as high as the fire-box, and extending to the rear of the furnace. passages, ducts, or flues are air passages or ducts c for heated air, and fines (l for the products of combustion. These above-named ducts c extend from suitable openings Gin the rear wall of the furnace, which openings have proper adjustable valves or doors to a cham ber, H,'in front of said ducts, by means of which currents of air drawn in at the rear of the furnace pass through the ducts etc the chamber H, whence such currents, turning to the rear, pass into the openings 6, and in such passage find their. way'into the ducts f above the fire-box, and out. through the openings 9 into the heating-chamber I. On the other hand the products of combustion pass up through the openings b into the heating-chamber I, which, it will be observed, is also a secondary combustion-chamber, and there uniting with the heated air in such chamber. At the point-of union a'combu-stion of the gases takes place. combustion, after the chamber I is filled, pass out of such chamber through the openings h into the flues d,- thence along said flues to the rear into the chimneys or exits J.

the end will present a wedge form, or else a recessed form, as shown at 1. Two of these bricks or tiles are put together, with the hol- [n this group of The products of thislast-named lowed sides facing each other, by which means the duct 0 is formed.

These bricks or tiles, placed on their ends one above the other, the beveled ends fitting into the recessed ends, and vice versa, form a series of ducts, 0., Other suitable bricks or tiles m, fitting into the cutaway corners l, separate the bricks or tiles making the series of ducts 0 from one another, leaving spaces which are lines d, before spoken of. These bricks or tiles and the t1 ues between them are so adj nsted as to their respective sizes that they are built closely into the space prepared for them, and fill the same, so as to require no other means to secure them in place.

It will be observed that the chamber I is to be constructed forthe particular purpose for which it is intended, its form depending, of course, upon the use for which it is to be adapted, whether for heating, reheating, smelting, or pnddling metals, and for the placing in position of gas or other retorts or crucibles.

The preferable mode of operation of this furnace is as follows: A fire being kindled in the usual way upon the hearth of the cham her I, the products of combustion pass off through the proper fines, as described, into the chimneys.

on the grate, and the fire-box should be filled about two-thirds full through the feed-chute,

or about even with the stoking-holes, with any kind of inferior grades of coal, coal-dust,

or screenings. The fire inthe hearth may then be raked off or suflered to burn out. The

fire on the grate should be allowed to burn until it is thoroughly kindled and the fuel begins to give 011" freely carbonic oxide, carbureted hydrogen, and vaporized hydrocarbons. Then air is allowed to enter the rear end of the furnace through the openings described,

After a little these flues be .come heated; then a fire should be kindled When it is necessary to replenish the fire,

more fuel should be added, and when the grate becomes clogged and choked with debris, by

inserting rods or bars in the holeseo the mass of fuel above is retained in position, while the debris belowsuch rods or bars may be dropped into the ash-pit. This fire thus made and replenished may be kept up as long as required,

the operation of the furnace in this respect being continuous.

The ad vantages of my furnace consist, chiefly, in the simplicityof its various parts, the

readiness with which the dues and ducts can be replaced, repaired, or cleaned out, and in its capacity to use a cheap or almost worthless fuel to great advantage.

Having thus described my furnace, what I I claim as new therein is 1. The brick or tilej, hollowed out on one:

side, and having a corner cut away, substantially as andfor the purposes set forth.

2. The group of passages, ducts, or flues F, composed of the bricks or tiles j, each hollowed out upon one side, and cut away at one corner, with concave and convex ends, and the intermediate bricks an, constructed and ar ranged substantially as and for the purposes set forth. 3. In a furnace,

set forth. a

4. In a furnace, the combination, with a fire-.

set forth.

This specification signed andwitnessed thistj 28th day of February, 1876. FREDERICK H. EIGHBAUM.

Witnesses V i CHARLES THURMAN, R. N. DYER.

the combination, with the. chamber I, of the ducts c and the fire-box E, l the fines d, the chamber H, the openingse, the: ducts f, and theopening b, constructed andw arranged substantially as and for the purposes 

